I recently bought this Samsung DVD player that also supports DivX/Xvid playback. So I decided to try playing some movies I encoded with DivX Pro 5.2.1 (the audio was mp3). The quality was very good (almost DVD like) but whenever there was a high motion scene (like a fast fight scene or a fast panning), the video starts becoming very jerky and the sound chops a lot. I assume the processor in the player cant decode it fast enough.

1. My question is whether I can minimise this sort of thing from occurring when I'm encoding my DivX movies. ie. turning off some options to make decoding less processor-intensive.

The movies I tested (and noticed this sort of thing happening) are 1 CD rips. The audio was CBR 112 kbps and the video was about 700+ kbps. I use the default Home Theatre profile, Standard mode, and PVE. Everything else is on default settings.

2. Might as well add a few more questions, while I'm here. I've heard that it is often not a good idea to use VBR mp3 in AVI unless I'm using the right tools. I use VirtualDubMod to do the muxing and each time I add the vbr mp3, I get a message about rewriting the header. I usually say 'no' to this but should I? It's worked well when I say 'no' but I'd like to know whether there are any potential syncing problems, when playing this avi on my hardware player.

It's not really kosher, but VBR mp3 in avi works fine. Just select "no" when asked to rewrite the header in VDubMod, otherwise you'll get sync problems.

you are either

a. hitting max supported bitrate (unlikely)
b. burning to cdrs and the max transfer speed is to low (unlikely, but you can try to reburn the divx movie to 'data' dvd and play from there)
c. doing something else wrong (likely )
oh, and
d. something is wrong with framerate (like playing 24fps stream on pal and player has to interpolate...) (unlikely)

Well, IMO this should never happen. Especially at the low bitrates (700kbps) you are using. Is the player DivX certified? If so, you have a major beef with DXN and Samsung. If it is DivX Certified what you are doing should _always_ work. If it doesn't they screwed up because either their codec is not respecting the VBV and using too high bitrate in these scenes or the player cannot handle it even when VBV is respected (in which case it shouldn't have been certified). BTW I just looked at the certified players on their site and I don't see any Samsung players so maybe it isn't DXN fault.



If you are muxing mp3 audio and in particular vbr mp3 audio, I would highly recommend that you use avimuxgui. This is alexnoe's sort of pet project so as you might imagine it works pretty nicely since it made to prove to the world that you can mux vbr audio in avi and still have it play in sync .

Ehm, there are 2 certified Samsung players:
Samsung DVDP244
Samsung HTDB750M

http://www.divx.com/hardware/certified/products.php

Thanks for the reply. I'll have to check the model of my player and see if its in that list Gambit gave. But I do remember seeing a big DivX logo on the front panel of the player so perhaps it is certified? Also there is a menu option for DivX registration where it gives you some code thingy. Dunno what it is.

Oh, I tried playing another movie that was encoded using the old DivX ;-) codec and encountered the same problem. Maybe the player is doing some postprocessing that I should turn off. I guess I'll fiddle around with it.



Thanks, I'll look into that.